Compact SMT Tactile Switch Designed For Bluetooth Applications

Product Overview

• Compact, low-profile surface-mount tactile switch designed for pairing, reset, wake, and function keys in Bluetooth devices
• Crisp, stable tactile feedback with low bounce noise; ideal for earbud charging cases, TWS, wearables, remotes, and BLE modules
• Compatible with high-speed SMT automation and lead-free reflow; optimized for tight RF layouts and EMC needs

Key Features

• Compact size: typical PCB footprint about 3.5 × 2.6 mm; low profile heights of 1.5/1.8/2.0 mm
• Multiple force options: light/medium/heavy actuation (approx. 150 gf / 230 gf / 320 gf) to balance feel and anti-misactuation
• Short travel, fast response: typical travel 0.13–0.20 mm; bounce time ≤10 ms
• Signal and reliability: rated 12 VDC / 50 mA; initial contact resistance ≤100 mΩ; insulation resistance ≥100 MΩ (@100 VDC)
• Long life: mechanical life ≥300,000 cycles (Ag contacts); up to ≥1,000,000 cycles with Au contacts
• Environmental: operating temperature −40°C to +85°C; compatible with Pb‑free reflow, dual reflow capable
• Materials and compliance: halogen-free; RoHS/REACH compliant; housing materials meet UL94 V‑0 flammability
• EMC/RF friendly: minimal metal mass and low profile help with near-antenna placement (final layout depends on full device RF evaluation)
• Options: dust/water-resistant structure (up to IP67); gold-plated contacts for low current and corrosive environments

Typical Applications

• Bluetooth earbuds and charging cases: pairing/reset/lid-open wake keys
• Portable remotes and smart home BLE endpoints: function and mode keys
• Wearables/smartwatches: side and shortcut keys
• BLE gateways and sensor nodes: maintenance/binding keys
• Automotive/audio devices: Bluetooth connect and control buttons

Electrical Specifications (typical)

• Rated load: 12 VDC / 50 mA (signal level)
• Contact resistance: ≤100 mΩ initial; ≤200 mΩ end of life
• Insulation resistance: ≥100 MΩ (@100 VDC)
• Dielectric withstand: 250 VAC for 1 minute, no breakdown
• Bounce time: ≤10 ms

Mechanical Specifications

• Dimensions: 3.5 × 2.6 mm (L × W); height options 1.5 / 1.8 / 2.0 mm
• Travel: 0.13–0.20 mm
• Actuation force: 150 / 230 / 320 gf (other forces customizable)
• Actuation type: top-actuated (side-actuated optional)
• Tactile feel: crisp feedback with low-noise dome structure
• Materials: stainless steel dome; LCP/PA housing; Ag or Au contact plating

Reliability and Testing

• Mechanical life: ≥300k cycles (Ag contacts), ≥1M cycles (Au contacts)
• Temperature cycling: −40°C to +85°C passed
• Vibration/shock: meets common levels for portable electronics
• Chemical/corrosion: Au contact version offers improved resistance to sweat/salt fog (project-specific validation available)

Assembly and Soldering

• Mounting: SMT; recommended pick-up nozzle diameter 3–5 mm
• Reflow: Pb-free per J‑STD‑020; peak ≤245°C; up to 2 reflow cycles
• Cleaning/conformal coating: avoid ingress into the switch; prefer sealed version if cleaning/coating is required
• Hand soldering: not recommended; if unavoidable, limit time/temperature and avoid lateral force
• Layout guidance: avoid immediate proximity to antenna feed lines; provide clearance for side loads; ensure housing headroom above the actuator

Packaging and Supply

• Tape & Reel packaging per EIA‑481
• Reel: 13 in.; 3,000 or 4,000 pcs per reel (model-dependent)
• Moisture sensitivity: MSL 1 (under standard dry storage)
• Labeling: model, lot, date code, and RoHS marking

Ordering Information

• Model: TS‑BT35‑H15‑F150‑AG
• BT35: compact Bluetooth‑focused series, approx. 3.5 × 2.6 mm
• H15: height 1.5 mm (H18/H20 available)
• F150: actuation force 150 gf (F230/F320 available)
• AG: silver contacts (AU = gold contacts); IP67 version suffix “W”
• Example: TS‑BT35‑H18‑F230‑AU‑W = 1.8 mm height, 230 gf, gold contacts, sealed (IP67) structure

Notes

• No built-in ESD protection; implement system-level ESD/EMI control and grounding
• Avoid lateral loading and overtravel; mechanical design should limit off-center force
• Post-assembly inspection recommended: continuity/bounce time/tactile consistency
• For outdoor or sweat exposure, choose gold contacts or sealed versions

Customizable Options

• Height, actuation force, and travel
• Contact material/plating and terminal corrosion resistance
• Top- or side-actuated structure; sealing level up to IP67
• Specific tape orientation and reel quantity